Hi Guys,
My experience with Emachines is a simpswr states.
Poor power supplies usually wipe out the MoBo and CPU. I know, I had 2 of these models and had to replace the PSU, MoBo & CPU (Under warrenty at the time) I no longer own Emachines. See this post:
Emachines Help
The link also gives you some alternatives, but I am unsure if all the links are still active.
Hope this helps
Bill